Method and apparatus for removing oil from the crank cases of engines



Jan, 19, 1932. E. .1. SWEETLAND 1,341,505

METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINESFiled Aug. 27, 1924 3 Sheets-Sheet l 7 3' 2 9 29 I 72 I 24- Z3 2 25 26%7 F: f 6' 9 H1 ii (i INVENTOR. ,Ff/VfSTfSl VfffZfl/Vfl Jan. 19, 193 E.J. SWEETLAND 1,341,505

METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINESFiled Aug. 27, 1924 3 Sheets-Sheet 2 I N VEN TOR.

Jam. 19, 1932. J, SWEETLAND I 1,841,505

METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINESFiled Aug. 27, 1924 3 Sheets-Sheet 3 H I l .49 n i h Q J 5 EV I! 5 I 26; ya m 45a 45 47 4';

IN V EN TOR.

Patented Jan. 19, 1932 UNITED STATES PATENT OFFICE METHOD AND APPARATUSFOR REMOVING OIL FROM THE CRANK CASES OF ENGINES Application filedAugult 27, 1924. Serial No. 784,890.

This invention relates to an apparatus for effecting rapid removal ofoil from the crallilk t e pakse of internal combustion engines or 5 Inthe operation of internal combustion engines and especially automotiveinternal combustion engines, the oil which is put into the enginerapidly deteriorates, due to the accumulation of carbon particles, roaddust,

metal particles, etc., therein and to dilution from gasoline whichescapes past the piston rings, so that proper care of the enginenecessitates frequent drainage of the oil from the crank case, andrefilling with fresh oil.

To permit draina e of the oil, the engine makers have hereto oreprovided the lowest portion of the crank case with a removable drainageplug or a pet cock, through which the oil could be drained by gravity;however the inconvenience and time required to drive the car upon arack, crawl under the car, remove the plug, wait for the somewhatviscous oil to drain out, replace the plug and then go through the samesteps to flush out .25 the crank case and oil conduits with kerosene orthe like has been one of the most disagreeable tasks in the care of theautomobile, either when performed by the owner or at a service station.

It is one of the objects of this invention to provide a means fordraining the oil from the crank case of an automobile without thenecessity for crawling under the automobile or driving the same upon arack or for waiting for the oil to drain out by gravity. An-

other object of the invention is to provide a means for draining thecrank case whereby the oil which flows by gravity from the drainageopening of the crank case may be 40 quickly removed to a convenientdischarge receptacle.

Another object of the invention is to provide an ejector adapted to besecured to the drainage opening at the lowest portion of the crank caseof an automobile engine and to have the inlet for the com ressed fluidfor operating the ejector, and the outlet for the oil discharged fromthe crank case by the ejector located above the crank case andpreferably beneath the hood of the automobile so that connection may bereadily made with the same for draining the oil from the crank case.

Another object of the invention is to provzde a system for draining andrefilling the crank case of an automotive internal combustion enginewhereby the oil may be drained from the crank case and forced from apoint below the drainage opening into a discharge receptacle, and newoil forced in thru the drainage opening to refill the crank case.

Another object of the invention is to combine with the crank case of aninternal combustion engine an ejector, so that by making suitablepressure connections with the ejector nozzle, the oil which flows intothe ejector may be quickly discharged therefrom.

Another ob ect of the invention is to provide a pressure means,utilizing a source of pressure which is ordinarily available aroundservice station,

for rapidly rethe garage or moving the 011 from the crank case of anengine.

Various other objects and advantages will appear as the description ofthe invention proceeds.

In the drawings which illustrate various forms of embodiment of theinvention,

Figure 1 is a sectional view of the bottom of a crank case, showing oneform of ejector secured to the drainage opening thereof.

Figure 2 is a diagrammatic elevation of one system for discharging andrefilling a crank case embodying my invention.

Figure 3 is an elevation of an engine equipped with another form of myoil discharging apparatus.

Figure 4 is a part sectional view of a crank Bil case showing an ejectordischarge mechanism formed as a part of the crank case.

Figure is a sectional view on the line 5-5 of Figure 4.

Figure 6 is a side elevation of an engine equipped with another form ofembodiment of my invention.

Figure 7 is an end view of the engine shown in Figure 6 with partsthereof omitted for the sake of clearness.

Figure 8 is a detail view of one form of breather opening for use withthe embodiment of the invention shown in Figures 6 and 7.

In Figure 1, the bottom 3 of the crank case 2 of an automobile internalcombustion engine is provided preferably at its lowest portion with anenlarged drainage opening 4 thru which the oil in the crank case mayflow when the drainage plug is removed, to drain the crank case.According to my invention, an ejector 6 is secured to the bottom of thecrank case 2 in any desired manner, with the opening 7 into an ejectorchamber 8 in communication with the opening 4 so as to permit the oil toflow by gravity into the ejector.

The ejector 6 is provided with a constricted opening 9 and with a nozzle10 for compressed air or other fluid under pressure, which extends intothe constricted opening 9 but is spaced therefrom, forming an annularpassage 11 thru which the oil from the cham ber 8 may be drawn todischarge the same thru the outlet pipe 12 when air or other fluid underpressure is forced by the nozzle 10 thru the opening 9.

The nozzle 10 is connected with a pipe 14 which extends upward above thecrank case, and is provided with bayonet slots 14a for easy connectionwith the ends 150: of an air hose 15, adapted to supply compressed airto the nozzle 10. The end of the pipe 12 is also extended upward to aposition under the hood of the automobile and is provided with bayonetslots 12a for easy connection with the discharge and refill conduit 16.Preferably the ends 12a and 14a of the pipes 12 and 14 are brought tothe same side of the engine so that all the connections for draining theoil may be made from one side. When not connected to the conduits 15 and16, the ends of the pipes 12 and 14 may be closed with suitable caps toprevent the entrance of dust into the same.

In order to permit rapid refilling of the crank case with new oil, thepipe 16 is connected with a three-way valve 17 adapted, when in theposition illustrated, to connect the pipe 16 with the conduit 18 to thedischarge receptacle 19. When all the oil has been discharged from thecrank case, the air to the nozzle 10 may be shut off and the stem of thevalve 17 rotated to the dotted line position to connect the pipe 16 withthe pipe 20, which communicates with the oil receptacle 21 containingoil under pressure, so that the oil will be forced rapidly thru theejector 6 into the crank case.

The oil receptacle 21 is preferably made of glass and is provided withcalibrations 22 thereon which read downward, so that the level of theoil will indicate directly the number of quarts or other units whichhave been discharged from the receptacle.

The top of the receptacle is provided with a pet cock 23 which is openedto release the pressure when the receptacle is being filled with oilfrom the pipe 24, which is controlled by a valve 24a. The air inlet pipe25 for creating the pressure for forcing the oil out of the receptacle21 is controlled by the valve 25a and extends above the normal level ofthe oil in the receptacle. A gauge 26 indicates the pressure in thereceptacle.

In order to prevent a portion of the oil which is forced by pressureinto the crank case from escaping from the top of the pipe 14, a checkvalve may be provided in a connection 281; between the pipe 1% andnozzle 10. A sprin 23 normally urges the valve 28 against its seal, butpermits the valve to open when air under pressure is introduced into thepipe 14. lf desired, the valve and connection 28a may be omitted and theupper end of the pipe 1-l may be close in any suitable way to preventthe oil from escaping therethru when the crank case is being filled.

A plug 13 in the wall of the ejector chamber 8 permits the crank caseand ejector to be drained by gravity when desired.

in the operation of the device, the air under pressure which flows fromthe pipe 10 thru the opening 9 works on the well-lrnown principle of anejector to draw the oil which flows into the chamber 8 from the crankcase, thru the space 11 around the nozzle 16, and discharge the samethru the pipe 12. zi lion all the oil has been discharged, the valve 17is turned to permit the new oil in the recepta cle 21 to flow underpressure into the crank case. The entire operation of draining andrefilling the crank case with the use of my apparatus and system can becompleted in a small fraction of the time required under the presentprocedure.

W hen it is desired to omit the discharge connection 12a and dischargeconduit 16, the device of Figure 3 may be used. In this embodiment ofthe invention, the pressure inlet 14:?) to the ejector 6a which issecured to the bottom of the crank case 2 may be provided with anordinary valve stem connection 140, adapted to cooperate with the valvewhich the ordinary tire inflating hose is equipped with, to opencommunication between the air under pressure in the tire inflatingequipment of the service station and the inlet 14b to the ejector whenthe valve on the tire line is pressed against the top of the pipe 145.The discharge outlet from the ejector is connected to an invertedU-shaped discharge pipe 126 which is open at its discharge end andpreferably projects downward below the oil pan of the engine, so thatwhen pressure connection is made with the pipe 145 and air or otherfluid under pressure is forced thru the ejector, the oil in the crankcase will be discharged from the pipe 12?; into a suitable container orupon the ground below the automobile.

In Figures 4 and 5, the ejector 6b is shown as builtinto the crank case2a and as being adapted to discharge the oil thru the outlet 27 intoa'suitable receptacle below the crank case. The ejector comprises theconduit 128 which communicates at the top with the outlet 27 and isprovided with a restricted orifice 129 at the bottom into which thepressure discharge nozzle 30 projects, a pipe 31 connects with thenozzle 30 below the crank case and extends upward to a position underthe hood of the automobile where it may be provided with a valve stemconnection 31a for connection with a source of pressure.

The ejector is located at the lowest portion 2d of the crank case 2a soas to receive oil therefrom by gravity, and to discharge the oil thruthe outlet 27. A plug 32 on the bottom of the crank case carries thenozzle 30 of the ejector and may be removed by disconnecting the union30a, to permit cleaning and inspection of the ejector or to permitdrainage of the oil by gravity from the portion 203 of the crank case.As illustrated, the ejector mechanism of Figures 4 and 5 may be formedintegral with the crank case by casting or may be formed as an invertedU-tube separate from the crank case and inserted into the crank casethru a hole located above the oil level, the opening 28a between theconduit 128 and the outlet pipe 27 is located above the normal oil levelto prevent the oil from flowing by gravity from the crank case.

It is to be noted in connection with Figures 3 to 5 that it is onlynecessary to raise the hood and press the nozzle of a tire inflatingline against the connection 140 or 31a to discharge the oil from thecrank case.

A further embodiment of a means for forcing the "oil from the crank caseof an engine is shown in Figures 6 to 8. In this embodiment, the crankcase 41 of the engine 42 is provided with a discharge pipe 43 whichextends from the lowest portion 41a thru the wall of the crank case at apoint above the normal level of the oil therein and outside the crankcase is provided with a connection 44 for a hose or other dischargeconduit.

The breather opening 45 for the crank case is provided with a centralcollar 46 supported from the walls of the opening by the web arms 47,and the stem 48 of the breather cap 49 extends into this collar. Thecollar 46 and stem 48 are provided with cooperating threads 46a and 4811which are preferably of a relatively steep pitch and the coil spring '50which surrounds the stem 48 is secured to the cap 49 and one of the arms47 by the pins 51 and 51a. A handle 52 is provided for turning thebreather cap, and a gasket 53 is provided around the bottom thereof toinsure a tight seal with the breather opening. An adjustable safetyvalve 54 is provided in the cap 49 to automatically open and relieve thepressure in the crank case when it exceeds a predetermined amount.

A cap or other suitable means may be provided for closing the usualfilling opening of the crank case, tomake the same substantially airtight and a pressure connection 55 is provided into the crank case.

In the operation of this embodiment of the invention, a dischargeconduit is connected onto the pipe 43 and the handle 52 of the breathercap 49 is turned a quarter turn to screw the stem 48 into the collar 46and bring the gasket 53 into fluid tight engagement with the topof theopening 45 to close the breather opening. Air or other fluid underpressure is then admitted to the crank case thru the connection 55 andas the pressure on the oil increases the oil in the crank case isquickly forced out thru the pipe 43. When all the oil has beendischarged the pressure fluid thru the connection 55 is turned olf,

the handle 52 of the breather cap may be released and the spring 50 willturn the cap in the other direction to move same away from the breatheropening to thus automatically open the breather and insure properoperation of the engine.

New oil may be forced into the crank case thru the pipe 43 as isillustrated in connection with Figure 2 or the crank case may be filledin the usual manner thru the filling opening.

Where it is not desired to use a detachable hose or other conduit forconveying the oil from the end of pipe 43 the pipe may be provided witha permanent extension which projects downward to discharge the oil belowthe engine as in the U-tube construction 12b of Figure 3.

It is pointed out that when the method herein described of rapidlyremoving the oil from a crank case is employed, the crank case is leftcleaner and freer from sediment than is the case when drained thru aplugin the ordinary manner, because of the greater rapidity of theoperation. To get the best result the engine is run prior to thedrainage operation until the oilis warm and all sediment is insuspension. Then without delay the warm oil is rapidly forced outwithout giving the sediment an opportunity to settle again. This resultsin leaving the crank case cleaner than is the case when the oil isdrained thru the ordinary drain opening by gravity after the delay ofremoving the plug.

I may use any fluid under pressure with the ejector; even water may beemployed.

Under certain conditions oil, and particularly used oil previouslydrained from other crank cases may be used to advantage.

In compliance with the patent statutes, I have illustrated and describedseveral preferred embodiments of my invention but it is to be understoodthat various modifications and changes may be made therein and thatparts of the invention may be used without others without departing fromthe spirit of my invention or the scope of the appended claims.

I claim:

1. The combination with the crank case of the engine of an automobile,of an ejector communicating with said crank case and adapted to receiveoil therefrom, a pressure fluid inlet to said ejector, a check valve insaid inlet, a discharge outlet from said ejector, and means positionedbeneath the hood of the automobile for permitting connection of anexternal source of pressure fluid and a discharge conduit to saidejector inlet and outlet respectively whereby the contents of the enginecrank case may be discharged when the engine is not running.

2. In an apparatus for discharging oil from the crank case of an engine,a chamber adapted to be connected to and receive oil from a dischargeopening in said crank case, an ejector connected with said chamber, apressure inlet and a discharge outlet for said ejector, a conduitconnected to said discharge outlet to convey the discharged oil to aplace rempte from said chamber, a valve in said conduit, a receptaclefor new oil and means to force new oil under pressure back thru saidconduit and ejector into the crank case when said valve is turned toopen communication betwecn said conduit and said receptacle for new oil.

3. In an apparatus for removing used oil in automotive internalcombustion engines, a conduit having connection to a low point in theoil containing case of said engine, means for bringing into connectionwith said conduit acombination induction and eduction tube and means ofcausing the used oil to pass in an outward direction thru said conduit,said means comprising a conduit attached to the eduction tube andextending upwardly to a point accessible from above the crank case uponraising the motorhood and a connecting gas pressure conduit at asuitable service station adapted to be attached to said educ-.

tion conduit to displace the used lubricant.

4. The combination with the crank case of an internal combustion engineof an inverted U-shaped conduit, having an orifice in one end thereof,adjacent the lowest portion of the crank case, a discharge outlet fromthe crank case at the other end thereof, a pressure nozzle extendinginto said orifice, an inlet connection for pressure fluid .to saidnozzle and means for removably connecting a pressure line from externalsource to said nozzle.

5. The combination with the crank case of an internal combustion engineof an oil discharge conduit, extending thru the wall P the crank caseabove the normal oil level, means for making the crank case fluid tight,means for'introducing fluid under pressure into said crank case to forcethe oil out thru said discharge conduit, and means for automaticallyopening the crank case to the atmosphere.

6. The combination with the crank case of an internal combustion engineof an oil dis charge conduit, extending thru the wall of the crank caseabove the normal oil level, means for making the crank case fluid tight,means for introducing fluid under pressure into said crank case to forcethe oil out thru said discharge conduit, means'for relieving thepressure in the crank case when it exceeds a predetermined amount, andmeans for automatically opening the crank case to the atmosphere.

7. In a system for discharging used lubricant from vehicle motors, thecombination with the lubricant holding case of the vehicle motorprovided with a drain opening located in the lowermost portion of saidcase of a discharge chamber attached below and communicating with saiddrain opening, of a discharge conduit attached to and carried by saidchamber, a pressure inlet to said chamber, and an ejector nozzleconnected to said pressure inlet and adapted to force the used lubricantfrom the case out of the discharge conduit.

8. In a system for discharging used lubricant from vehicle motors, thecombination with the lubricant holding member of the vehicle motorprovided with a drain opening located in the bottom of such member, of adrain chamber attached to and communicating therewith, a dischargeconduit and a pressure inlet connection in said drain chamber, thechamber being formed as an ejector and a connecting pressure hoselocated at a suitable service station to be connected to the inletconnection of the ejector whereby the used oil may be quickly withdrawnfrom the vehicle motor.

9. In a system for discharging lubricant from the crank case of avehicle motor, a drain chamber below said case and communicatingtherewith, a discharge conduit attached to the chamber adapted tocommunicate with an outlet thereof and extending upwardly to a pointabove the highest level of the liquid in the crank case and to a pointacressible from above said crank case upon raising the motor hood, apressure inlet hose extending to the inlet of said chamber from a pointof ready accessibility above the crank case, and external pressure meansadapted to Ill 1 extending upwardly be temporarily connected to theinlet hose to force the lubricant from the engine.

10. In a system for discharging lubricant from the crank cases of motorvehicle motors, an ejector chamber attached to and draining said crankcase, discharge and inlet conduits attached to respective portions ofthe said chamber extending upwardly to a point above the highest-levelof the liquid in the crank case and to a pointaccessible from above thecrank case upon raising the motor hood, a pressure means located at asuitable service station adapted to be applied to said inlet conduit toeject the lubricant from the case and a suitable eduction hose to beapplied to the discharge conduit, said eduction hose being provided witha three way cock to permit discharge of the spent lubricant and inlet offresh lubricant.

11. In a system for discharging lubricant from the crank case of avehicle motor, an ejector chamber draining said crank case, a dischargeand an inlet conduit attached to respective portions of the ejectorchamber and to a point above the highest level of the liquid in thecrank case, the inlet conduit extending to a point accessible'from abovethe crank case upon raising of the motor hood, and a pressure hose froma suitable service station external of the vehicle adapted to be appliedto the inlet conduit to rapidly eject the lubricant.

12. In an apparatus for discharging lubricant from a motor vehicle, thecombination 0 a lubricant containing case, a discharge conduit securedto the said case and communicating with the same below the body of lubricant therein, and extending to a point readily accessible above thepoint at which the same is secured to the containing case, said conduitbeing adapted to normally prevent the flow of lubricant from the saidcase, an inlet communicating with the interior of the said case abovethe normal level of lubricant within the said case, means for connectingthe said inlet with a source of air under pres sure, and means forconnecting the discharge pipe with a lubricant receiving container.

13. In a system for discharging lubricant from vehicle motors, thecombination with the lubricant containing case of the motor vehiclesprovided with admin opening located in the bottom of such case, of adischarge conduit secured to the said case communicating with the saidopening and extending to a point accessible from above the said openingand normally closing said drain opening to prevent the discharge oflubricant therefrom, an inlet opening above the normal lubricant levelin the said case, means in open communication with the said inlet andconnected with a source of air under pressure, and means connecting thesaid drain conduit with a lubricant receiving container.

14. In a filling station accessory, the combination of a pressure hose,means for temporarily establishing a union between one end of the saidhose and an inlet in the lubricant case of a motor vehicle, a container,means for temporarily establishing communication between a drainageoutlet in the lubricant containing case and the container, and means toproduce a relatively higher pressure in the lubricant containing casethan in the container.

15. In an apparatus for dischargin lubricant from a motor vehicle, thecom ination of a lubricant containing case, a discharge conduit securedto said case to remove the lubricant therefrom, an inlet communicatingwith the interior of said case adapted to be connected with a sourceexternal to the engine parts of fluid under pressure to expel thelubricant from the case to a point external to said crank case.

16. The apparatus according to claim 12, wherein the case has a safetyvalve to prevent damage in the event of the air pressure in the case ofbecoming excessive.

17. In an apparatus for discharging lubricant from a motor vehicle, thecombination of a lubricant containing case, a discharge conduit securedto the case and communicat ing with same in position to carry off thelubricant therein, said discharge conduit extending to a readilyaccessible point on the vehicle and being adapted normally to preventflow of lubricant from said case, the case having an inlet communicatingwith the interior thereof, and means for connecting said inlet with asource of gaseous fluid under pressure to force the lubricant outthrough the discharge pipe.

18. In a system for discharging lubricant from vehicle motors, thecombination with the lubricant containing case of the motor, said casebeing provided with a depression to which lubricant tends to drain, of adischarge conduit secured to said case communicating with saiddepression and extending to and discharging at a point outside the crankcase, the lubricant containing case having an opening and means incommunication with said opening to be connected with a source of fluidunder pressure to force the lubricant in the case out thru saiddischarge pipe.

19. In an apparatus for removing the oil from a crank case of aninternal combustion engine, said crank case being provided with alowermost point to which the oil will drain, a tube built into said caseand having its lower end extending to a point adjacent to the lowermostportion of the crank case, and having its upper end above the normallubricant level of said case, means for creating a diference in pressurein said tube to cause the lubricant to discharge from the upper end ofsaid tube and means to convey the discharge from said tube to a pointexternal of the engine.

20. In an automotive internal combustion engine, of the class described,having a lubricant containing crank case, an eduction tube therein, thelower end of said tube extending into said crank case lubricant, and theupper end projecting externally of said crank case inlet, meansconnected to a source of superatmospheric pressure to remove the crankcase lubricant from said crank case by introducing a fluid underpressure into said crank case.

21. In an apparatus for discharging lubricant from a motor vehicle, acrank case, a conduit extending below the level of the lubricant in saidcrank case and extending above the level of said lubricant and externalof said crank case, an inlet communicating with said crank case andmeans to connect the inlet with a source of fluid under pressure toforce the lubricant thru said conduit.

22. The combination with the crank case of an engine of an automobile ofan ejector communicating with said crank case adapted to receive oiltherefrom, a pressure fluid inlet to said ejector, a discharge outletfrom said ejector above the normal oil level in said crank case andmeans ositioned beneath the hood of the automobil for permittingconnection of an external source of pressure fluid and a dischargeconduit to said ejector inlet and outlet respectively, whereby thecontents of the engine crank case may be discharged when the engine isnot running.

23. In an apparatus for discharging oil from the crank case of anengine, a chamber adapted-to be connected to and receive oil from adischarge opening in said crank case, an ejector connected with saidchamber, a pressure inlet and a discharge outlet for said ejector, and aconduit connected to said discharge outlet to convey the discharged oilto a place remote from said chamber and engine.

24. In an apparatus for removing used oil in automotive internalcombustion engines. a conduit having a connection to a low point in theoil containing case in said engine, means for bringing into connectionwith said conduit a combination induction and eduction conduit, meansfor causing the used oil to pass in an outward direction thru saidconduit, said means comprising a conduit attached to the eduction tubeand a connecting gas pressure conduit adapted to be attached to saideduction conduit to displace the used lubricant and discharge saidlubricant to a place remote from the engine.

25. The combination with the crank case of an internal combustion engineof an inverted U-shaped conduit, an orifice in one end thereof, adjacentthe lowest portion of the crank case, a discharge outlet from the crankcase at the other end thereof, a pressure nozzle extending into saidorifice, an inlet connection for pressure fluid to said nozzle, andmeans for removably connecting a gas pressure line from an externalsource to said nozzle.

26. A combination with the crank case of an internal combustion enginenormally open to atmospheric pressure of an oil discharge conduit,extending thru the wall of the crank case above the normal oil level,means for making the crank case fluid tight, means for introducing fluidunder pressure into said crank case for forcing the oil out thru saiddischarge conduit and means for opening the crank case. to theatmosphere.

combination with the crank case of an internal combustion enginenormally open to atmospheric pressure of an oil discharging conduit,extending thru the wall of a crank case above the normal oil level,means for making the crank case fluid tight, means for introducing fluidunder pressure into said crank case, to force the oil out thru saiddischarge conduit, and means for relieving the pressure in the crankcase, when it exceeds a predetermined amount.

28. In a system for discharging used Inbricant from the crank case of amotor vehicle, a drain chamber below said case and communicatingtherewith, a discharge conduit attached to the chamber, adapted tocommunicate with an outlet thereof and extending upwardly to a pointabove the highest level of the liquid in the crank case and to a pointaccessible above the crank case, a pressure inlet conduit, extending tothe inlet of said chamber from a point of ready accessibility above thebottom of the crank case and external pressure means adapted to betemporarily connected to said inlet conduit to force the lubricantfromthe engine to a point remote thereto.

29. In a system for discharging lubricant from the crank case of avehicle motor, an ejector chamber draining said crank case, a dischargeand an inlet conduit attached to respective portions of the ejectorchamber, and extending upwardly to a point above the highest level ofthe lubricant in the crank case, the inlet conduit extending to anaccessiblc point and a pressure hose from an external source adapted tobe applied to the inlet conduit to rapidly eject the lubricant.

30. In an apparatus for discharging lubricant from a motor vehicle, alubricant containing case, a discharge pipe secured to said case,communicating at a point within the body of lubricant therein and nearthe bottom thereof, and extending to a point readily accessible abovethe lubricant containing case, said pipe being adapted to normallyprevent the flow of lubricant from said case, an inlet communicatingwith the interior of the said case above the normal level of lubricantwithmeans for connecting said inlet in said case,

pipe secured to the said case and communicating with the same from belowthe body of lubricant therein, and extending to a point readilyaccessible above the point at whicli v the same is secured to thecontaining case, said pipe being adapted to normally prevent the flow ofIn ricant from the said case, an inlet communicating with the interiorof the said case above the normal level of lubricant within the saidcase, means for connecting the said inlet with a source of air underpressure, and means for connecting the discharge pipe with a lubricantreceiving container.

32. In a crank case for internal combustion engines comprising an oilsump, a conduit leading from said sump and extending g5 upwardly to apoint above the normal oil level of said crank case, means for renderingthe crank case substantially fluid tight and means carried by said crankcase whereby fluid under super-atmospheric pressure may be admittedthereinto to cause the oil to flow upwardly from said sump to a pointexternal to said crank case.

33. In a crank case for internal combustion engines comprising an oilsump, a conduit leading from said sump and extending upwardly to a pointabove the normal oil level of said crank case, means for rendering thecrank case substantially fluid tight an means carried by said crank casewhereby fluid under super-atmospheric pressure may be admitted thereintoto cause the oil to flow upwardly from said sump to a point external tosaid crank case, safety means associated with said crank case to preventsaid superatmospheric pressure from exceeding a predetermined limit.

34. In a crank case for internal combustion engines comprising an oilsump, a conduit leading from said sump and extending upwardly to a pointabove the normal oil level of said crank case, means for rendering thecrank case substantially fluid tight and means carried by said crankcase whereby fluid under super-atmospheric pressure may be admittedthereinto to cause the oil to flow upwardly from said sump to a pointexternal to said crank case, said means of rendering the crank casefluid tight being so constructed as to open said crank case to atmos'herie pressure automatically when released y the operator.

35. A crank case for automotive internal combustion engines having atube built into said case, one end of said tube being adjacent 65 to anoil sump in said case and the opposite end of said tube being located ata level above the normal oil level of said case, means of ensealing thenormal vent of said case to render said case temporarilly fluid tightand means of forming a temporary union with an external source of fluidunder pressure to force the oil to discharge from said sump thru saidtube to a pointexternal to said case.

36. An automotive engine having an oil carrying case, said case having alow point to which oil will drain, an ejector chamber in opencommunication with said case, an opening to said chamber adapted toreceive a connection from a source of fluid under pressure external tosaid engine, an eduction tube leading from said chamber adapted todischarge oil from the oil carrying case to a point external to saidengine when a fluid under pressure is applied to said ejector.

37 An apparatus for rapidly removing the used lubricant from thelubricant carrying case of an automotive vehicle engine comprising asump in said case to which the lubricant Will drain, a conduit leadingfrom said sump to conduct the used lubricant to a point external t0 andnot forming a part of said engine, a fluid pressure connectionassociated with said engine and adapted to be connected with a source offluid pressure external to said engine to forcibly eject the lubricantfrom said sump.

38. An apparatus for rapidly removing the used lubricant from thelubricant carrying case of an automotive vehicle engine and rapidlyreplacing said lubricant with a fresh supply of same which comprises asump in said case to which the contained lubricant will: drain, adischarge conduit with an opening ad acent to said sump, a fluidpressure connection associated with said engine adapted to be connectedwith a source of fluid pressure external to said engine to forciblyeject the lubricant from said sump thru said conduit to a point externalto and not forming part of said engine and pressure means to force freshlubricant into said lubricant carrying case thru said conduit after theused lubricant has been expelled.

39. The combination with the oil carrying case of an automotive enginehaving a sump to which oil will drain of an eduction conduit one end ofwhich leads from said sump upwardly to a point above the normal oillevel in the engine and then turns downwardly to lead discharged oil toa point external to said case and said engine, an opening associatedwith said case to receive fluid pressure from a source external to saidengine, said fluid pressure acting to forcibly discharge the oil fromsaid case thru said conduit.

40. In an apparatus for discharging lubricant from a motor vehicle, thecombination of a lubricant containing case, a discharge conduit securedto said case and communicating With same below the level of lubricanttherein and extending to a point readily accessible above the point atwhich the same is secured t0 the containing case, said conduit being,adapted normally to prevent the flow of lubricant from said case, aninlet communieating with the interior of said case, means for connectingthe said inlet with the source of fluid under pressure, said dischargeconduit extending outside the lubricant contain ing case.

In testimony whereof I have affixed my signature to this specification.

ERNEST J. SXVEETLAN D.

